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A Compact High Sensitivity Micro-Displacement Sensor Based on a Long-Period Fiber Grating with an Air-Cavity

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4 Author(s)
Yunpeng Wang ; Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China ; Chun-liu Zhao ; Liang Qi ; Limin Hu

a compact high sensitivity micro-displacement sensor based on a long-period fiber grating (LPG) with an air-cavity is proposed and experimentally demonstrated. The sensor head is obtained by composing an air-cavity with a LPG and a single mode fiber (SMF). The shift of the wavelength of the LPG is depended on the length of the air gap. The experimental results show that the sensitivity 0.2155nm/μm is achieved within the measurement range of 0 to 140μm at the initial air gap length of about 216μm.

Published in:

Photonics and Optoelectronics (SOPO), 2012 Symposium on

Date of Conference:

21-23 May 2012

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